1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "crypto/signature_creator.h" 6 7 #include <cryptohi.h> 8 #include <keyhi.h> 9 #include <stdlib.h> 10 11 #include "base/logging.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "crypto/nss_util.h" 14 15 namespace crypto { 16 17 SignatureCreator::~SignatureCreator() { 18 if (sign_context_) { 19 SGN_DestroyContext(sign_context_, PR_TRUE); 20 sign_context_ = NULL; 21 } 22 } 23 24 // static 25 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) { 26 scoped_ptr<SignatureCreator> result(new SignatureCreator); 27 result->key_ = key; 28 29 result->sign_context_ = SGN_NewContext(SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION, 30 key->key()); 31 if (!result->sign_context_) { 32 NOTREACHED(); 33 return NULL; 34 } 35 36 SECStatus rv = SGN_Begin(result->sign_context_); 37 if (rv != SECSuccess) { 38 NOTREACHED(); 39 return NULL; 40 } 41 42 return result.release(); 43 } 44 45 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { 46 // TODO(wtc): Remove this const_cast when we require NSS 3.12.5. 47 // See NSS bug https://bugzilla.mozilla.org/show_bug.cgi?id=518255 48 SECStatus rv = SGN_Update(sign_context_, 49 const_cast<unsigned char*>(data_part), 50 data_part_len); 51 if (rv != SECSuccess) { 52 NOTREACHED(); 53 return false; 54 } 55 56 return true; 57 } 58 59 bool SignatureCreator::Final(std::vector<uint8>* signature) { 60 SECItem signature_item; 61 SECStatus rv = SGN_End(sign_context_, &signature_item); 62 if (rv != SECSuccess) { 63 NOTREACHED(); 64 return false; 65 } 66 signature->assign(signature_item.data, 67 signature_item.data + signature_item.len); 68 SECITEM_FreeItem(&signature_item, PR_FALSE); 69 return true; 70 } 71 72 SignatureCreator::SignatureCreator() : sign_context_(NULL) { 73 EnsureNSSInit(); 74 } 75 76 } // namespace crypto 77
